Four blueish-green disk-shaped objects hovered in the sky for a couple of minutes before gliding away towards the mountainsThere were four objects seen, all of them were disk shaped. They hovered in the air for a couple of minutes, before gliding away in the direction of the mountains. They gave off a blueish-green light, but seemed to flash yellow once every few seconds. Although they were seen in Tokyo, the objects were well above the lights of the city. In addition to this, Tokyo is not extremely bright to begin with, especially where the objects were spotted.At the time of the sighting, myself and three friends were in my apartment on the 11th floor. The shapes and lights were clearly identifiable.